EP 1957866 A4 20130911 - CIRCULATING FLUIDIZED BED BOILER HAVING IMPROVED REACTANT UTILIZATION
Title (en)
CIRCULATING FLUIDIZED BED BOILER HAVING IMPROVED REACTANT UTILIZATION
Title (de)
ZIRKULIERENDER WIRBELBETTKESSEL MIT VERBESSERTER REAKTIONSMITTELNUTZUNG
Title (fr)
CHAUDIERE A LIT FLUIDISE CIRCULANT UTILISANT LE REACTIF DE MANIERE OPTIMISEE
Publication
Application
Priority
- US 2006044016 W 20061109
- US 28191505 A 20051117
Abstract (en)
[origin: WO2007061668A2] A circulating fluidized bed boiler having improved reactant utilization. The circulating fluidized bed boiler includes a circulating fluidized bed having a dense bed portion; a lower furnace portion adjacent to the dense bed portion; and an upper furnace portion, wherein the dense bed portion of the circulating fluidized bed boiler is maintained below the stoichiometric ratio (fuel rich stage) and the lower furnace portion is maintained above the stoichiometric ratio (fuel lean stage), thereby reducing the formation of NOx.; a reactant to reduce the emission of at least one combustion product in the flue gas; and a plurality of secondary air injection ports downstream of the circulating fluidized bed for providing mixing of the reactant and the flue gas in the furnace above the dense bed, wherein the amount of reactant required for the reduction of the emission of the combustion product is reduced. In a preferred embodiment, the circulating fluidized bed boiler may further include a return system for returning carry over particles from the flue gas to the circulating fluidized bed.
IPC 8 full level
F23C 10/10 (2006.01); F23J 7/00 (2006.01)
CPC (source: EP KR US)
F23C 10/00 (2013.01 - KR); F23C 10/10 (2013.01 - EP US); F23J 7/00 (2013.01 - EP US); F23C 2206/103 (2013.01 - EP US)
Citation (search report)
- [XI] EP 0033808 A1 19810819 - BATTELLE DEVELOPMENT CORP [US]
- [XI] US 5715764 A 19980210 - LYNGFELT ANDERS [SE], et al
- [XI] US 5442919 A 19950822 - WILHELM BRUCE W [US]
- See references of WO 2007061668A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2007061668 A2 20070531; WO 2007061668 A3 20080103; AU 2006316618 A1 20070531; CN 101292115 A 20081022; CN 101292115 B 20100922; EP 1957866 A2 20080820; EP 1957866 A4 20130911; KR 20080084976 A 20080922; PL 211124 B1 20120430; PL 384257 A1 20080721; RU 2008122212 A 20091227; US 2007119387 A1 20070531; US 7410356 B2 20080812; US 8069825 B1 20111206
DOCDB simple family (application)
US 2006044016 W 20061109; AU 2006316618 A 20061109; CN 200680008991 A 20061109; EP 06827761 A 20061109; KR 20087014689 A 20080617; PL 38425706 A 20061109; RU 2008122212 A 20061109; US 14252408 A 20080619; US 28191505 A 20051117